spine-runtimes

Why we included this project

Game developers and tool builders who want to render Spine-authored 2D skeletal animations inside their own engines will find this repository the runtime implementation for playback. It ships runtime libraries for a wide spread of languages (C++, C#, Java, TypeScript, Dart, Haxe, Swift, and more), so the same animation data can be loaded and rendered identically whether you target Unity, a custom engine, or a web canvas. Beyond simple playback, the runtimes support blending, procedural manipulation of the skeleton hierarchy, constraints, and physics, which matters when characters need to react to gameplay rather than loop canned frames. The default branch stays in sync with the latest stable Spine editor export format, and each runtime directory carries its own README, making integration practical even if you only care about a single language. The custom license terms are worth noting: integrating is free, but every end user of your product must hold their own Spine license unless you purchase a distribution license.